ABSTRACT
The purpose of this multi-surgeon study was to assess and compare the accuracy of acetabular component placement, leg length discrepancy (LLD), and global offset difference (GOD) between six different surgical techniques and modes of guidance in total hip arthroplasty (THA). A total of 1980 THAs met inclusion criteria. Robotic- and navigation-guided techniques were more consistent than other techniques in placing the acetabular cup into Lewinnek's safe zone (P<0.005 and P<0.05, respectively). Robotic-guided surgery was more consistent than other techniques in placing the acetabular component within Callanan's safe zone (P<0.005). No statistically significant differences were found between groups in the frequency of patients with excessive LLD. Clinically significant differences between groups were not found in the frequency of patients with excessive GOD. Level of Evidence: IV.
Subject(s)
Arthroplasty, Replacement, Hip/methods , Hip Prosthesis , Leg Length Inequality/epidemiology , Robotic Surgical Procedures/statistics & numerical data , Acetabulum/surgery , Aged , Arthroplasty, Replacement, Hip/adverse effects , Arthroplasty, Replacement, Hip/statistics & numerical data , Female , Humans , Illinois/epidemiology , Leg Length Inequality/etiology , Middle Aged , Retrospective Studies , Robotics , Treatment OutcomeABSTRACT
Obese populations present challenges for acetabular cup placement during total hip arthroplasty (THA). This study examines the accuracy of acetabular cup inclination and version in the obese patient with robotic-assisted computer navigation. A total of 105 patients underwent robotic-assisted computer navigation THA with a posterior approach. Groups were divided on body mass index (BMI, kg/m(2)) of <30, 30-35, and >35. There was no statistical difference between the BMI <30 (n=59), BMI 30-35 (n=34) and BMI >35 (n=12) groups for acetabular inclination (P=0.43) or version (P=0.95). Robotic-assisted computer navigation provided accurate and reproducible placement of the acetabular cup within safe zones for inclination and version in the obese patient.
Subject(s)
Acetabulum/surgery , Arthroplasty, Replacement, Hip/methods , Hip Prosthesis , Obesity/complications , Robotic Surgical Procedures/statistics & numerical data , Acetabulum/diagnostic imaging , Aged , Body Mass Index , Female , Humans , Male , Middle Aged , Obesity/surgery , Radiography , Robotics , Surgery, Computer-AssistedABSTRACT
There are no reports examining the learning curve during the adoption of robotic assisted THA. The purpose of this study was to examine the learning curve of robotic assisted THA as measured by component position, operative time, and complications. The first 105 robotic-assisted THAs performed by a single surgeon were divided into three groups based on the order of surgery. Component position, operative time, intra-operative technical problems, and intra-operative complications were recorded. There was a decreased risk of acetabular component malpositioning with experience (P<0.05). Operative time appeared to decrease with increasing surgical experience (P<0.05). A learning curve was observed, as a decreased incidence of acetabular component outliers and decreased operative time were noted with increased experience.
